|Dual Balloon Concept for Lifting Payloads from the Surface of Venus - Kerzhanovich, Viktor V.|
Introduction: Two high-rated Venus mission concepts proposed in the National Science Foundation Decadal Survey require a balloon to lift payloads from Venusian surface to high altitudes: Venus Surface Sample Return (VESSR) and Venus In-Situ Explorer (VISE). In case of VESSR the payload is a canister with the surface sample plus a Venus ascent vehicle (VAV), which is a rocket that takes the sample into orbit for rendezvous with an Earth return vehicle...
Keywords: COMETS; IONIZATION; LASERS; MASS SPECTROSCOPY; STARDUST MISSION; AEROGELS; WILD 2 COMET; VOLATILITY
|Viking orbiter views of Mars - Carr, M. H.|
Images acquired by the Viking orbiters, beginning in 1976 are presented. The pictures represent only a small fraction of the many thousands taken, and were chosen to illustrate the diverse geology of Mars and its atmospheric phenomena. Specific topics discussed include the Viking mission and its objectives, a brief comparison of Earth and Mars, and surface features of Mars including the great equatorial canyons, channels, volcanic and deformational features, and craters...
Keywords: HYDROGENATION; SYMMETRY; ORGANIC COMPOUNDS; REACTION KINETICS; ACIDS; BASES (CHEMICAL); CATALYSTS; CHEMICAL REACTIONS; OPTICAL PROPERTIES; SOLVENTS